I am getting a syslog message os MCAST-4-RX_LVRANGE: IGMP: Rcvd Leave in the range 01-00-5e-00-00-xx. According to cisco this is a host communicating on a multicast control traffic group, and this should not be happening. Any idea on the best way to nail down which port this inappropriate traffic is coming in on? Don;t want to have to mirror each vlan with a sniffer to track down. Thanks